EUVD-2026-41310
GHSA-vq29-gpgr-jh2f
Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Contributor account required (PR:L), victim interaction needed (UI:R), scope changes to victim browser (S:C); no availability impact from XSS alone.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Lifecycle Timeline
1DescriptionCVE.org
Contributor Cross Site Scripting (XSS) in Livemesh Addons for WPBakery Page Builder <= 3.9.4 versions.
AnalysisAI
Stored Cross-Site Scripting in Livemesh Addons for WPBakery Page Builder versions 3.9.4 and earlier allows authenticated Contributors to inject persistent malicious scripts into WordPress pages. When a higher-privileged user such as an Editor or Administrator views the affected content, the injected script executes in their browser session - enabling session hijacking, credential theft, or privilege escalation within the WordPress admin panel. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold a valid Contributor-level (or higher) account on the target WordPress site - unauthenticated exploitation is not possible given PR:L in the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L) scores 6.5, reflecting a moderate-severity finding. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers or obtains a Contributor account on a target WordPress site and creates a new post or page using the WPBakery Page Builder, embedding a malicious JavaScript payload within a Livemesh addon widget field. When an Editor or Administrator later opens that draft for review or preview, the stored script executes in their authenticated browser session - allowing the attacker to exfiltrate the admin's session cookie, create a new admin account via authenticated AJAX, or install a malicious plugin. … |
| Remediation | Patch available per vendor advisory - update Livemesh Addons for WPBakery Page Builder to a version beyond 3.9.4 as detailed in the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/addons-for-visual-composer/vulnerability/wordpress-livemesh-addons-for-wpbakery-page-builder-plugin-3-9-4-cross-site-scripting-xss-vulnerability-2. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
Leaving vuln.today